Alec Baldwin has reprised in his role as Donald Trump for the latest episode of Saturday Night Live’s Weekend Update, identifying the US president as the true martyr of the tragic Charlottesville rally.

A 12-year-old singing ventriloquist has been awarded US$1 (A$1.3) million prize and her own Las Vegas show after taking the America's Got Talent crown on the season 12 finale of the NBC reality competition.

Trump warns Clinton against using the 'woman card'

US Republican presidential candidate Donald Trump has intensified his criticism of Hillary Clinton after she said he had a "penchant for sexism," warning his Democratic rival against using the "woman card".

In a familiar pattern for Trump, he responded to fire - this time over a vulgarity he used in describing Clinton's 2008 primary loss - with fire.

"Be careful Hillary as you play the war on women or women being degraded card," Trump said in a Twitter post.

Later he tweeted: "Hillary, when you complain about 'a penchant for sexism,' who are you referring to. I have great respect for women. BE CAREFUL!"

The real estate tycoon, who is the front-runner for the 2016 Republican nomination, drew widespread criticism this week after using Yiddish slang for a man's genitals to describe Barack Obama's victory over Clinton in the 2008 Democratic presidential race, saying: "She got schlonged."

While Clinton's campaign would not comment on Thursday on Trump's warning, she addressed his rhetoric in an interview with the Des Moines Register in Iowa, where she was campaigning for the state's early presidential contest.

"I really deplore the tone of his campaign, the inflammatory rhetoric that he is using to divide people, and his going after groups of people with hateful, incendiary rhetoric," she said on Tuesday, the day after Trump's slang remark.